SC338IMS.TR Semtech Corporation, SC338IMS.TR Datasheet

SC338IMS.TR

Manufacturer Part Number

SC338IMS.TR

Description

MSOP 10/LINEAR FET CONTROLLER

Manufacturer

Semtech Corporation

Datasheet

1.SC338IMS.TR.pdf (14 pages)

Specifications of SC338IMS.TR

Pack_quantity

2500

Comm_code

85423990

Lead_time

994

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The SC338(A) is an ultra low output voltage dual power

supply controller designed to simplify power management

for notebook PCs. It is part of Semtech’s Smart LDO

family of products. The SC338(A) has two user

adjustable outputs that can be set anywhere between

0.5V and 3.3V (V

1.8V for V

output.

SC338(A) features for each output include tight output

voltage regulation (±2.5% over -40°C to +85°C for

SC338, ±1.5% over 0°C to +85°C for SC338A), enable

controls, open drain power good signals, under-voltage

protection and soft start. The enable pins allow the part

to enter a very low power standby mode. Pulling them

high enables the outputs. The power good pins are open

drain and assert low when the voltage at their

respective adjust pins is below 88% (typ.) of nominal. If

the voltage at the adjust pin is below 50% (typ.) of

nominal, the under voltage protection circuitry will shut

down that output. The SC338(A) is available in an

MSOP-10 surface mount package.

Revision 7, November 2002

POWER MANAGEMENT

Description

Typical Application Circuit

1.05V Power Good

1.2V +/-5% IN

1.05V @ 3A

OUT

1.05V Enable

100uF, 25mOhm POSCAP

5 .

= 5V) using two external resistors per

= 12V, anywhere between 0.5V and

11.0k

10.0k

Notes:

(1) Additional capacitance may be required if far from supply

(2) Optional soft-start components

0.1uF (1)

IRF7311

or similar

10nF (2)

R5 2k (2)

DRV1

ADJ1

EN1

PGD1

GND

SC338(A)

DRV2

PGD2

ADJ2

EN2

Features

Applications

±1.5% and ±2.5% reference voltage options

available

Two independant and fully adjustable outputs

Wide supply voltage range permits operation from

5V or 12V rails

Very low quiescent current (500µA typical with both

outputs enabled and 5V input)

Indivdual Enable control for each output

Individual Power Good monitoring and signalling for

each output

Gate drives from input supply enable use of

N-channel MOSFETs

User selectable dropout voltage

Individual under-voltage protection for each output

MSOP-10 surface mount package

Notebook PCs

Simple dual power supplies

5V or 12V IN

0.1uF

Dual Linear FET Controller

R6 2k (2)

Ultra Low Output Voltage

10nF (2)

20.0k

10.0k

0.1uF (1)

OUT

100uF, 25mOhm POSCAP

SC338(A)

5 .

www.semtech.com

1.5V Enable

1.5V Power Good

1.8V +/-5% IN

1.5V @ 1.5A

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